鹤山丘陵退化生态系统植被恢复的土壤动物群落结构

对南亚热带恢复生态学研究基地-鹤山丘陵综合试验场20a人工植被林土壤动物群落进行了调查研究。研究样地包括草坡、松林、荷木混交林、马占相思林和豆科混交林。结果表明:在个体数量上,豆混林与马占林之间不存在显著差异,但与其它林分间差异明显(p<0.05);草坡土壤动物个体数明显处于最低水平;在类群的丰富度上,豆混林显著(p<0.05)高于所有其它林分,但无论是林分之间抑或季节之间,其变化的幅度都明显比个体数小;根据DG指数,各人工林可明显分为豆混林()、马占林()和荷混林()、针叶林()、草坡()3个层次。季节的差异很明显,湿季各项指标都低于干季。土壤表层各项指标的绝对值都与F2、F3层有极显著的差别(p<0.01),而F2、F3层之间却非常接近。长角跳虫科、鳞跳虫科、蚁科、康虫八科、蟹蛛科、巨蟹蛛科、球蛛科、鞘翅幼虫和半翅幼虫与群落总体特征(DG指数)的相关性都达到显著水准(p<0.05)。DG指数在反映不同人工林土壤动物群落特征上具有很好的稳定性。

The responses of soil fauna composition to forest restoration in Heshan

Soil fauna communities were studied in various 20 year-old regenerated vegetation types at the Heshan Research Station. There was no significant difference in fauna individual number between the mixed Acacia forest and Acacia mangium forest. However, there was significant difference in fauna individual number between these two forests and the grassland, pine and mixed Schima superba forest (p<0.05). The lowest fauna individual number was found in grassland while mixed Acacia forest had the highest group abu...